| Figure 1 |
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| Scanning analog voltages corresponding to the row of the key pressed in a 4×4 keypad into a 4 bit µC's ADC saves four irreplaceable I/O lines. |
back |
| Figure 1 |
|
| Scanning analog voltages corresponding to the row of the key pressed in a 4×4 keypad into a 4 bit µC's ADC saves four irreplaceable I/O lines. |
back |